UNIVERSITY OF CALIFORNIA PUBLICATIONS 



IN 



ZOOLOGY 



Vol. 10, No. 4, pp. 137-142, 2 text-figures April 13, 1912 



MYOTIS ORINOMUS ELLIOT, A BAT NEW 

 TO CALIFORNIA 



BY 



J. GRTNNELL and H. S. SWAETH 

 (Contribution from the Museum of Vertebrate Zoology of the University of California) 



While working up the collection of vertebrates obtained by 

 the Museum parties in the San Jacinto region of southern Cali- 

 fornia in the summer of 1908, the authors of the present paper 

 found some difficulty in determining certain small bats of the 

 genus Myotis. This led to an overhauling of all the specimens 

 of this genus thus far accumulated by the Museum, with the 

 result that one species was distinguished which hitherto had not 

 been credited to the mammalian fauna of the state. 



This form does not belong to any of the species included by 

 Miller (1897) in his revision of the Vespertilionidae. A review 

 of the subsequent papers dealing with species of Myotis accounted 

 for all proposed names except Myotis orinomus Elliot (1903, 

 p. 228). 



Elliot's description applies to our unnamed bats from the 

 San Jacinto region in certain important respects; but in others, 

 such as cranial dimensions, there is marked disagreement, s<> that 

 comparison of specimens themselves became indispensable. 



Through the kind offices of Mr. "Wilfred H. Osgood, we have 

 been permitted to examine a topotype and two additional speci- 

 mens of Myotis orinomus, from the Field Museum of Natural 

 History. These are all from the San Pedro Martir region, north- 

 ern Lower California. Mexico, and bear data as follows : Skin 

 and skull, <?, no. 10849 (Field Mus.), La Grulla, Lower Cali- 

 fornia, September 11, 1902, collected by E. Heller; skin and 



